Originally Posted by mommakee
Also, for what it's worth, remember the cloud base was in the vicinity of 1700 ft above *MSL* (I am using GPS altitude in these plots).
I had the impression it might be a bit higher than that, though it isn't worth anything.
I've watched three videos of this, one from several miles upwind more or less in line with the runway (posted by skadi at #468).
It looks like the disappearance in cloud is about double the height of the low point before climbing, but that's only an approximation.
The video has the aircraft in cloud for about 34 seconds. Fitting that on your height plot, that would have the base slightly over 2000 feet (edit: amsl)
Incidentally, also about that video, there isn't any apparent sideways movement, so I still haven't figured out why some people are talking about a bank angle.